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38 selected entries:  1   21

IATA ICAO City Region State ^ Country OSH   Oshkosh   WISCONSIN USA ODW   Oak Harbor   WASHINGTON USA OLM   Olympia   WASHINGTON USA OKA   Okinawa   Ryukyu Islands Japan XOK   Oakville   Ontario Canada YOO   Oshawa   Ontario Canada YOW   Ottawa   Ontario Canada OKC   Oklahoma City   OKLAHOMA USA OAX   Oaxaca   Oaxaca Mexico OGS   Ogdensburg   NEW YORK USA OAG   Orange   New South Wales Australia OMA   Omaha   NEBRASKA USA OWB   Owensboro   KENTUCKY USA OTM   Ottumwa   IOWA USA ORL   Orlando   FLORIDA USA MCO   Orlando   FLORIDA USA OAK   Oakland   CALIFORNIA USA ONT   Ontario   CALIFORNIA USA OXR   Oxnard/Ventura   CALIFORNIA USA ORN   Oran     Algeria